Bar’s Leaks introduces Head Gasket Fix, the first chemical solution to permanently repair head gasket and other major cooling system leaks simply by adding it directly to the radiator where it mixes with existing antifreeze/coolant. No flushing is required. Head Gasket Fix is effective in all gasoline and diesel engines. Bar’s Leaks Head Gasket Fix uses patent-pending formulas combining high-grade and specialty sealing liquids with various sizes of gasket-sealing particles to penetrate gaps and cracks, and then harden to permanently stop leaks. In addition to repairing blown head gaskets, it also fixes leaking cylinder heads, intake gaskets, cracked blocks and freeze plugs. It is compatible with all types of antifreeze. The product also can be used in cooling systems containing only water. Bar’s Leaks Head Gasket Fix works on aluminum and cast iron heads and engine blocks.